
October 10, 2006  21521D6
Am29LV200B
19
D AT A  S H E E T
Command Definitions
Table 5. Am29LV200B Command Definitions
Legend:
X = Don’t care
RA = Address of the memory location to be read. 
RD = Data read from location RA during read operation.
PA = Address of the memory location to be programmed. 
Addresses latch on the falling edge of the WE# or CE# pulse, 
whichever happens later.
PD = Data to be programmed at location PA. Data latches on the 
rising edge of WE# or CE# pulse, whichever happens first.
SA = Address of the sector to be verified (in autoselect mode) or 
erased. Address bits A16–A12 uniquely select any sector.
Notes:
1. See Table 1 for description of bus operations.
2. All values are in hexadecimal.
3. Except when reading array or autoselect data, all bus cycles 
are write operations.
4. Data bits DQ15–DQ8 are don’t cares for unlock and 
command cycles.
5. Address bits A16–A11 are don’t cares for unlock and 
command cycles, unless SA or PA required.
6. No unlock or command cycles required when reading array 
data.
7. The Reset command is required to return to reading array 
data when device is in the autoselect mode, or if DQ5 goes 
high (while the device is providing status data).
8. The fourth cycle of the autoselect command sequence is a 
read cycle.
9. The data is 00h for an unprotected sector and 01h for a 
protected sector. See “Autoselect Command Sequence” for 
more information.
10. The Unlock Bypass command is required prior to the Unlock 
Bypass Program command.
11. The Unlock Bypass Reset command is required to return to 
reading array data when the device is in the unlock bypass 
mode.
12. The system may read and program in non-erasing sectors, or 
enter the autoselect mode, when in the Erase Suspend 
mode. The Erase Suspend command is valid only during a 
sector erase operation.
13. The Erase Resume command is valid only during the Erase 
Suspend mode.
Command
Sequence
(Note 1)
C
1
1
Bus Cycles (Notes 2–5)
Third 
Addr
Data Addr
First
Second 
Addr
Fourth 
Fifth 
Sixth 
Addr
RA
XXX
555
AAA
555
AAA
555
AAA
Data
RD
F0
Data
Data
Addr Data
Addr
Data
Read (Note 6)
Reset (Note 7)
A
Manufacturer ID
Word
Byte
Word
Byte
Word
Byte
4
AA
2AA
555
2AA
555
2AA
555
55
555
AAA
555
AAA
555
AAA
90
X00
01
Device ID, 
Top Boot Block 
Device ID,
Bottom Boot Block
4
AA
55
90
X01
X02
X01
X02
(SA)
X02
223B
3B
22BF
BF
XX00
XX01
00
01
4
AA
55
90
Sector Protect Verify 
(Note 9)
Word
4
555
AA
2AA
55
555
90
Byte
AAA
555
AAA
(SA)
X04
Program
Word
Byte
Word
Byte
4
555
AAA
555
AAA
XXX
XXX
555
AAA
555
AAA
XXX
XXX
AA
2AA
555
2AA
555
PA
XXX
2AA
555
2AA
555
55
555
AAA
555
AAA
A0
PA
PD
Unlock Bypass
3
AA
55
20
Unlock Bypass Program (Note 10)
Unlock Bypass Reset (Note 11)
2
2
A0
90
PD
00
Chip Erase
Word
Byte
Word
Byte
6
AA
55
555
AAA
555
AAA
80
555
AAA
555
AAA
AA
2AA
555
2AA
555
55
555
AAA
10
Sector Erase
6
AA
55
80
AA
55
SA
30
Erase Suspend (Note 12)
Erase Resume (Note 13)
1
1
B0
30